What does "sole" mean?

Additional senses

1. 2.Hast wandered through the world now long a day, Yet ceasest not thy weary soles to lead. Spenser.
2. 3.The bottom of a shoe or boot, or the piece of leather which constitutes the bottom. The "caliga" was a military shoe, with a very thick sole, tied above the instep. Arbuthnot.
3. 4.The bottom or lower part of anything, or that on which anything rests in standing. Specifially: (a) (Agric.) The bottom of the body of a plow; -- called also slade; also, the bottom of a furrow. (b) (Far.) The horny substance under a horse's foot, which protects the more tender parts. (c) (Fort.) The bottom of an embrasure. (d) (Naut.) A piece of timber attached to the lower part of the rudder, to make it even with the false keel. Totten. (e) (Mining) The seat or bottom of a mine; -- applied to horizontal veins or lodes. Sole leather, thick, strong, used for making the soles of boots and shoes, and for other purposes.
4. 5.To furnish with a sole; as, to sole a shoe.
5. 6.Being or acting without another; single; individual; only. "The sole son of my queen." Shak. He, be sure . . . first and last will reign Sole king. Milton.
6. 7.(Law) Single; unmarried; as, a feme sole. Corporation sole. See the Note under Corporation.